Details

Autor(en) / Beteiligte

• de Andrade, Aline Franciel
• Flores, Rilner Alves
• Casaroli, Derblai
• Bueno, Amanda Magalhães
• Pessoa-de-Souza, Marco Aurélio
• Jardim, Carlos Cesar Silva
• de Oliveira Abdala, Klaus
• Marques, Eduardo Parra
• Mesquita, Marcio

Titel

Biometric and Physiological Relationships and Yield of Sugarcane in Relation to Soil Application of Potassium

Ist Teil von

• Sugar tech : an international journal of sugar crops & related industries, 2022-04, Vol.24 (2), p.473-484

Ort / Verlag

New Delhi: Springer India

Erscheinungsjahr

2022

Link zum Volltext

Quelle

SpringerLink

Beschreibungen/Notizen

• This study evaluates the effect of the soil application of potassium (K) on the physiological, productive, and economic variables of the first sugarcane ratoon grown in the Brazilian Central region. The experiment was arranged in a randomized complete block design, with five replicates. Treatments consisted of five doses of K (0; 41.5; 83.0; 124.5; and 166.0 kg ha −1 ). K contents in the soil, biometric variables, relative chlorophyll index, gas exchange parameters, and stem and sugar yield were evaluated. Soil application of K increased the K content in the soil with quadratic adjustment at depths from 0.0 to 0.2 m, with the maximum content of 0.38 cmol c dm −3 when 164.3 kg K ha −1 was applied. The significant adjustment was linear at the depths from 0.2–0.4 and 0.6–0.8 m, reaching 0.27 and 0.11 cmol c dm −3 , respectively, for the highest dose applied. The application of K did not affect plant height in any of the periods evaluated, although affecting the number of tillers and leaf area at 120 DAB, reaching higher values at the dose of 166.0 kg K ha −1 . Stomatal conductance, transpiration, photosynthesis, and internal CO 2 concentration were affected by the increased application of K, with the dose of approximately 83.0 kg ha −1 resulting in the highest values. The dose of 166.0 kg K ha −1 obtained the best stem and recoverable sugar yields, 135.4 t ha −1 and 18.6 t ha −1 , respectively, also obtaining the highest differential profit, US$ 425.8, in relation to the non-application of K fertilizer.